The reason Placemarks (as opposed to lat/long coordinates) are preferred for communication on this forum is because they are both less ambiguous and easier for everyone to use. If you don't know how to make and post one, there are posts with guidance HERE.
Your find is interesting. There doesn't seem to be anything about it in the old Google Earth Community Layer. The fact that there seem to be 3 hulls positioned side-by-side-by-side suggest to me some sort of deliberate scuttling rather than a ship wreck. I didn't search for information beyond the GEC Layer, but I suspect you can turn up something with an internet search.
just what I have thought at first glance: it is a border of default ocean floor view and coastal imagery section where best-resolution imagery is default. so what we see (as default) at the exact point is some transition zone between the two types of GE imagery, where coastal aerial imagery (from 6/18/2012) still slightly visible, making the three vessels to be seen as if were submerged.